JP5175382B2 - Liquid pouring nozzle - Google Patents

Description

  The present invention is composed of a laminated film, and is configured integrally with the side or top of a soft and flexible packaging bag body, or is formed as a separate structure from the packaging bag body. It relates to a liquid dispensing nozzle that is fusion-bonded to the packaging of a bag or filled with a liquid package, in particular, inexpensive and easy to manufacture and handle. The present invention proposes a liquid dispensing nozzle having a so-called check function that can sufficiently prevent the outside air from entering the packaging bag when the packaged object is dispensed multiple times.

  For example, liquid and jelly-like foods and beverages with a volume exceeding 100 ml, seasonings and other packaging bags, caps made of plastic injection molded products etc. on the inner surface of a relatively rigid packaging bag body containing aluminum foil According to this, the packaged item can be poured out a plurality of times based on the removal and screwing operation of the cap with respect to the dispensing nozzle. .

  However, in such a packaging bag, the cost of the pouring nozzle and cap, which are plastic molded products, is high, and the pouring nozzle having a three-dimensional shape is sufficient for the packaging bag body. In addition to the fact that complete heat-sealing under proper bonding strength is still difficult using special heat-sealing means etc., it is necessary to remove the cap and re-screw each time the packaged item is poured out. There is troublesome handling. Moreover, for packaging bags that are relatively hard and difficult to be crushed and deformed, replacement of the packaged items and the outside air in the packaging bag is essential as the packaged items are poured out. After the end, it is inevitable that the outside air enters the packaging bag until the cap is screwed into the dispensing nozzle, and dust, fungi, etc. in the outside air contaminate the package, and the outside air itself However, there is a problem that the packaged material may be oxidized to impair the seasoning, the flavor of the alcoholic beverage, and the like.

  An object of the present invention is to solve such problems of the prior art, and the object of the present invention is to take out outside air into the packaging bag when the packaged material is poured out. It is applied to the soft packaging bag body that responds to the pouring by contraction or crushing deformation, and the discharge port is automatically opened by the wetting by the packaging at the same time as the pouring of the packaging is stopped It has a self-sealing check function that reliably prevents the outside air from entering the packaging bag, and does not require the cap to be removed from the dispensing nozzle, making it easy to manufacture. It is possible to provide an inexpensive liquid dispensing nozzle that can always be reliably and easily integrated with the packaging bag body or clerically fused and joined thereto.

  The liquid dispensing nozzle according to the present invention is used by fusing and joining the base end to the side or top of the flexible packaging bag body, and is a thermoplastic, uniaxial or biaxially stretched base film layer, A laminated film on each side of the front and back, each having a sealant layer laminated between them, for example, two laminated films on the front and back sides, or a laminated film formed by folding the front and back at the center. The sealant layers of the packaging bag are fused to each other in the peripheral portion except the base end side, and the packaged body in the packaging bag body is poured out under the tilt of the packaging bag body. The inner surface is separated from each other by the water head pressure of the object to open the tip spout, and the packaging bag body contracts or collapses according to the volume of the packaged product to take outside air into the packaging bag. While doing without When the packaging bag is raised and returned at the same time as the pouring of the packaged item is stopped, it is released from the action of the head pressure of the packaged product and returns to its original shape, and a thin film of the packaged product is interposed. The inner surfaces wetted with each other are exposed to a reduced-pressure atmosphere based on the shrinkage or crushing deformation of the packaging bag main body, adsorb negative pressure to each other, and automatically seal the spout into the packaging bag. It is characterized by having a self-seal check function for preventing the outside air from entering.

Such a liquid pouring nozzle is a sealant that can be, for example, an unstretched polyethylene layer (hereinafter referred to as “PE layer”) or a polypropylene layer (hereinafter referred to as “PP layer”) of the respective laminated films on the front and back sides. The layers can be easily and quickly manufactured by fusing the required side portions of the laminated film by, for example, heat sealing, high frequency sealing, impulse sealing, or the like.
Here, when the fusion part is formed by heat sealing of the sealant layers facing each other, the fusion part as expected can be reliably formed at a relatively low temperature, simply and quickly.

  The liquid pouring nozzle composed of at least a three-layer laminated film and the pouring nozzle composed of at least a two-layer laminated film, which will be described later, are configured by fingers. In order to facilitate tear opening according to requirements, the stretching direction of the uniaxially stretched base film layer or the longitudinal direction (MD) of the biaxially stretched base film layer is substantially the width direction of the laminated film, in other words, the required direction of tearing It is preferable to arrange in the direction of travel.

  Here, “substantially in the width direction of the laminated film” means that the liquid pouring nozzle is formed integrally with a packaging bag formed by fusion bonding to the packaging bag body or a packaging bag body as described later. In any of the packaging bags, the width direction of the laminated film is usually the direction corresponding to the vertical direction of the packaging bag, in other words, the direction in which the nozzle tears and opens, in other words, the extension of the nozzle spout edge. Considering that the direction may be intentionally inclined at an angle in the range of 0 to 15 ° in the direction in which the lower end portion of the spout edge is separated from the packaging bag body with respect to the width direction of the laminated film. is there.

In addition, the base film layer referred to in this specification is a uniaxial or biaxially stretched polyethylene terephthalate, ethylene vinyl alcohol copolymer, nylon, polypropylene, or the like, and a required vapor deposition layer provided on any of them. In particular, when the biaxially stretched polyethylene terephthalate film layer is used as a biaxially stretched polyethylene terephthalate film layer, use “Emblet PC” (trademark Unitika Co., Ltd.), which is a straight-cut polyester film. However, when the biaxially stretched nylon film layer is used, it is preferable to use “Emblem NC” (trademark Unitika Co., Ltd.), which is a straight-cut nylon film, for the following reason.
That is, according to these, in addition to the case where the uniaxially stretched base film layer is used for the dispensing nozzle, it is possible to impart higher water vapor impermeability, gas barrier properties, etc. It is possible to smoothly and easily remove the linear tearing with fingers, and to make the tearing wrinkle sufficiently smooth with no fluffing or the like, so that the sealing and sealing function can be sufficiently exerted on the pouring nozzle.

The pouring nozzle made of the laminated film having at least a three-layer structure manufactured as described above is a sealant layer located on the outer surface of the nozzle, for example, various non-stretched PE layers, PP layers, metallocene catalysts. An olefin-based resin layer such as a polyethylene layer, an ethylene vinyl acetate copolymer layer, an ethylene ethyl acrylate copolymer layer, an ionomer layer, etc. are preferably used as the inner surface layer of the soft packaging bag body, preferably the same kind of sealant layer In addition, for example, by heat-sealing, the base end portion of the pouring nozzle can be fusion-bonded to the packaging bag body in a simple, rapid and always reliable manner. On the other hand, the packaging bag provided with the pouring nozzle which protrudes outward from the side part or the top part can be manufactured.
In this case, as a matter of course, the sealant layer to be located on the inner surface of the nozzle can also be formed of the same material as described above.

  By the way, when the outer surface of the base end portion of the pouring nozzle made of a laminated film having at least a three-layer structure having sealant layers on both the inner and outer surfaces is fused and joined to the inner surface of the packaging bag body in this way. In order to reliably prevent mutual fusion of the inner surface of the dispensing nozzle, a release sheet having a higher melting point or not thermally melted is inserted and arranged inside the base end of the nozzle, and the inner and outer surfaces of the nozzle The melting temperature of the sealant layer on the inner surface of the nozzle can be changed by changing the fusing temperature of each of the sealant layers by changing the material, for example, by changing the extrusion lamination conditions of each sealant layer of the same material, etc. It is effective to make it higher than that of the surface sealant layer.

Here, the filling and packaging of seasonings, soups and other liquid objects to be packed in the packaging bag are performed simultaneously with the bonding process of the liquid pouring nozzle made of a laminated film of at least a three-layer structure to the packaging bag body or the bonding thereof. This filling and packaging can be performed after the process, for example, in a state in which the outside air is sufficiently excluded from the inside of the packaging bag by, for example, filling in the liquid or performing air evacuation after filling the packaged item. It is preferable to perform the above in order to prevent oxidation or the like of the packaged item in the bag, and it is preferable to cause the pouring nozzle to exhibit a non-return function as described later more reliably.
This also applies to the case where a liquid pouring nozzle made of a laminated film having at least a two-layer structure as described later is integrated with the packaging bag body.

By the way, as for the use and consumption etc. of the packaging in the bag, it is not different from the fact that the pouring nozzle becomes a film having a layer structure of two or more layers, and a film having a layer structure of three or more layers. The tip spout is formed in the nozzle by removing the fused portion at the tip thereof by tearing and cutting with fingers, and then the packaging bag is tilted so that the nozzle spout is oriented downward. In this case, the pouring nozzle made of a soft laminated film is separated from the front and back sides under the action of the water head pressure of the article to be packaged to open the tip outlet, Allow for dispensing as required.
When the packaged item is dispensed in this way, the flexible packaging bag body shrinks or collapses by the amount corresponding to the dispensed volume without sucking outside air as the packaged item is dispensed. Will be transformed.

After dispensing the required amount of packaged goods by tilting the packaging bag, the packaging bag is returned to its original standing position to stop the dispensing. At the same time that the inner surface of the packaged article is in close contact with the thin film of the package, the tip of the nozzle is moved across the width of the film on the front and back of the dispensing nozzle, in other words, in the vertical direction. The spout is sealed to prevent outside air from entering the packaging bag.
Therefore, in the packaging bag having the dispensing nozzle, the packaged items in the bag are sufficiently protected from contact with the outside air during and after the dispensing as well as before the dispensing of the packaged items. Thus, oxidation, fouling and the like of the packaged items in the bag are effectively prevented.

By the way, such close contact of the film on the front and back of the pouring nozzle here, in addition to returning the pouring nozzle to the original shape at the time of manufacture by releasing the pouring nozzle from the action of the hydraulic head pressure by the standing return of the packaging bag, When the packaged item in the dispensing nozzle returns to the inside of the packaging bag body, the inner surfaces of the front and back films wetted by the packaged item are automatically exposed to each other by being exposed to a reduced-pressure atmosphere. Such close contact is caused by the fact that the packaging bag body that has been shrunk or crushed and deformed as the article to be packaged from the packaging bag is poured into the interior of the packaging bag based on its inherent elastic restoring force. This is more certain when the pressure is reduced.
Thus, without special operation for the dispensing nozzle, it is possible to automatically close and seal the tip outlet of the packaging bag together with the rising and returning of the packaging bag. Can be demonstrated.

  On the other hand, the re-pouring of the article to be packaged can be performed by tilting the packaging bag as described above, and the stopping thereof can also be performed in the same manner as described above. In this case as well, the dispensing nozzle exhibits an excellent check function against the ingress of outside air based on the automatic close sealing.

  In order for the tip-fused portion of the dispensing nozzle to function as described above, the width of the laminated film having three or more layers or two or more layers can be removed. It is preferable to provide a V-shaped bent portion positioned corresponding to the opening position of the nozzle on at least one of the respective fusion portions that oppose the direction. According to this, the fusion portion itself is V-shaped. Therefore, it is possible to sufficiently induce tearing without forming a separate tear-inducing rivet such as a V-notch or -notch at the fusion part, and to make the tear-inducing portion visible very easily. Can do.

  In such a pouring nozzle, more preferably, at least the V-shaped bent portions described above are mutually connected to each other in the width direction of the laminated film having the three-layer structure or the two-layer structure. Even if there is a slight bend, stagnation, or the like from the V-shaped bent portion on the base end side from the formation position of the film, it is inclined and extended with a downward tendency, and preferably, the width direction of the laminated film Each part of the fusion part that opposes the gap between the base end part and the position where the V-shaped bent part is formed, toward the V-shaped bent part. Even so, it will gradually decrease as a trend.

  According to the former, in particular, when a large amount of packages are present in the packaging bag body, it is possible to advantageously eliminate the risk of unexpected leakage of the packages from the dispensing nozzle. According to the above, it is possible to make it easier to control the flow rate and direction of pouring when the article to be packaged is poured out from the tip spout of the pouring nozzle.

Further, one packaging bag having the liquid dispensing nozzle according to the present invention is formed of a laminated film having a layer structure of three or more layers, and the base end portion of any of the liquid dispensing nozzles described above is replaced with a soft packaging bag body. The sealant layers are fused to each other at the inner surface of the packaging bag body, and the liquid pouring nozzle protrudes from the side or top of the packaging bag body.
Here, the film structure of the soft packaging bag body is such that the base film layer located on the outer surface and the sealant layer located on the inner surface are the same type of base film layer and sealant layer as the dispensing nozzle, respectively. In addition, an appropriate intermediate layer may be interposed between them.

  In such one packaging bag, preferably, the sealant layer forming the inner surface of the soft packaging bag body is made of the same resin material as the sealant layer on the outer surface of the liquid dispensing nozzle. According to this, the fusion splicing strength of the packaging bag main body of the liquid pouring nozzle can be sufficiently increased.

  By the way, a liquid pouring nozzle made of a laminated film having a layer structure of three or more layers and a packaging bag main body for fusing it, and a pouring nozzle or a packaging bag main body made of a laminated film having a two or more layer structure described below. Any of the respective sealant layers can be laminated to it by extrusion lamination or dry lamination to the base film layer.

  According to the present invention, the other liquid pouring nozzle made of a laminated film having at least a two-layer structure is integrally formed by projecting from the side or top of the soft packaging bag body, usually the packaging bag. Two or folded layers, each of which has the same film structure as the main body, and includes a uniaxially or biaxially stretched base film layer and a sealant layer laminated on one surface side thereof. Films are fused to each other, preferably by heat sealing, in the peripheral part of the projecting part from the packaging bag body, which is preformed or formed post- or simultaneously with the sealant layers facing each other. The dispensing of the packaged body in the packaging bag body is performed under the tilting of the packaging bag body to separate the inner surfaces from each other by the water head pressure of the packaged bag and to open the tip spout. The packaging bag itself is contracted or crushed according to the volume of the package to be dispensed without taking outside air into the packaging bag. In addition to being released from the action of the head pressure of the packaged object and returning to the original shape, the inner surface wetted by the thin film of the packaged product is contracted or crushed by the packaging bag body. It has a self-sealing check function that prevents the outside air from entering the packaging bag by automatically sealing the spout with the negative pressure adsorbed by being exposed to the reduced pressure atmosphere based on deformation. Features.

  This dispensing nozzle is also manufactured easily, quickly, and inexpensively, as well as reliably by the heat sealing, at the same time as or before and after the formation of the packaging bag body. The bag body can always be properly integrated into one body, and at the time of dispensing the packaged item from the packaging bag and stopping it, a liquid dispensing nozzle made of at least a three-layer structure film and By functioning in the same manner, it is possible to effectively prevent the outside air from entering the packaging bag.

  Moreover, in any of these liquid pouring nozzles, the uniaxial or biaxially stretched base film layer of the laminated film has a polyethylene terephthalate film layer (hereinafter referred to as having a vapor deposition layer of 8 to 30 μm). (Referred to as PET layer) or a nylon resin film layer (hereinafter referred to as “NY layer”), and the sealant layer of the laminated film is composed of an unstretched PE layer or PP layer having a thickness of 10 to 60 μm. It is preferable to do.

  That is, the PET layer and the NY layer as the base film layer are preferable for exhibiting excellent water vapor impermeability and a high gas barrier property in the pouring nozzle, and the PE layer and the PP layer as the sealant layer are compared. It is preferable for exhibiting excellent sealing strength at a heat sealing temperature of a low temperature.

By the way, when the thickness of the base film layer is less than 8 μm, water vapor impermeability and gas barrier properties may be insufficient. On the other hand, when the thickness exceeds 30 μm, the bending strength of the laminated film is large. Therefore, the adhesiveness of the inner surface of the nozzle after the stoppage of the packaged article may be impaired.
Further, when the thickness of the sealant layer is less than 10 μm, sufficient seal strength may not be ensured, and when it exceeds 60 μm, the bending strength of the laminated film may be excessively increased.

The water vapor permeability (JIS K7129) of the uniaxial or biaxially stretched base film layer shall be 10 g / (m ² · 24 h) or less at 40 ° C and 90% humidity in any liquid pouring nozzle. Is preferred.
When the water vapor permeability exceeds 10 g / (m ² · 24 h), the intervening thin film of the liquid pouring nozzle maintained in a sealed state under the intervening thin film of the package is lost relatively early. There is a possibility that the sealed state of the outlet nozzle is released in a short period of time within 10 days, and the precipitated crystals after disappearance of liquid components such as moisture may cause blocking of the inner surface of the nozzle.

Here, it is preferable that the bending strength per unit width (15 mm) of the laminated film, in other words, the stiffness is 40 to 300 mN as measured according to the method described later.
If the stiffness is less than 40 mN, it will be difficult to accurately specify the direction in which the package is to be poured out of the packaging bag, and it will be integrated into the packaging bag body and the same layering In a liquid pouring nozzle composed of a laminated film having a layer structure of two or more layers, the packaging bag main body cannot be denied, and there is a risk that the strength of the packaging bag itself is insufficient. On the other hand, when it exceeds 300 mN, there is a concern that the close-sealing function of the dispensing nozzle may be lowered regardless of the laminated structure of the laminated film.

Moreover, it is preferable that the extension length of the nozzle spout edge extended in the substantially width direction of a laminated film shall be 5-40 mm irrespective of the lamination | stacking number of the laminated film.
As described above, the “substantially width direction” herein refers to the tearing advance direction, and thus the extending direction of the nozzle spout edge, at an angle in the range of 0 to 15 ° with respect to the width direction of the laminated film. This is in consideration of a point that may be inclined.
If the length of the nozzle spout edge is less than 5 mm, the amount of spout is too small in relation to the volume of the packaging bag body, whereas if it exceeds 40 mm, it is difficult to accurately specify the spout direction.

And other packaging bags using other liquid pouring nozzles made of a laminated film having a laminated structure of two or more layers are provided with any of the above-mentioned pouring nozzles of the soft packaging bag body. From the side part or the top part, it is integrated with the packaging bag body at the same time as or after the formation of the packaging bag body.
The former literally includes the case where the liquid pouring nozzle is literally manufactured at the same time as the formation of the packaging bag body and the case where the packaging bag body is formed behind the production of the pouring nozzle.

  In this packaging bag, the laminated film for the packaging bag body and the laminated film for the liquid pouring nozzle are shared, so that a process for fusion bonding of both of them is not necessary and an independent casting is performed. Since it is possible to eliminate the need to produce a dispensing nozzle, it is possible to completely remove only the occurrence of a bonding failure, etc., and to make the required packaging bag simpler, faster and cheaper. .

  Such a packaging bag can also function the liquid dispensing nozzle in the same manner as the one packaging bag described above when dispensing the packaged items, and after stopping the dispensing of the packaged items, It is possible to effectively prevent the outside air from entering the packaging bag by maintaining the close sealing of the pouring nozzle for a long period of time under the intervention of the thin film of the package.

  In the packaging bag described above, regardless of the laminated structure of the laminated film, at least the outer surface of the liquid pouring nozzle forming part of the pouring port, that is, the outer surface in the vicinity of the pouring port, silicone oil, wax-like If a substance or other water-repellent substance is applied, or if the outer surface has ultra-fine irregularities such as lotus leaves or taro leaves, return the packaging bag to a standing position and The so-called liquid drainage property when stopping the dispensing of the product can be improved, and the unexpected dripping of the package can be effectively prevented.

  Furthermore, the method of use of any of the packaging bags as described above is such that the tip of the liquid dispensing nozzle of the packaging bag is removed by tearing or excision to form a spout, and the cover in the packaging bag is formed. For example, in a tilted posture of the packaging bag stored in a paper or plastic box, the package is poured out without inhaling outside air from the spout provided in the liquid dispensing nozzle, and the packaging bag is returned to its standing position. In accordance with the stoppage of the dispensing, the inner surface of the liquid dispensing nozzle is brought into close contact with the entire surface under the thin film of the package to wet the inner surface, and the outside air enters the packaging bag. To prevent it.

  According to this method, the article to be packaged is dispensed under the contraction or crushing deformation of the packaging bag body without taking in outside air into the packaging bag, and after the dispensing is stopped, the dispensing nozzle By preventing the outside air from entering the packaging bag with the close sealing of the inner surface of the packaging bag, it is possible to sufficiently prevent the object to be packaged remaining in the packaging bag from being contaminated or oxidized by the outside air.

As is apparent from the above description, according to the present invention, a liquid dispensing nozzle composed of a laminated film of two or more layers or three or more layers, or a laminated film of two sheets or a folded structure can be manufactured at a very low cost. In addition, the pouring nozzle can be integrated with the main body of the packaging bag or joined to the packaging bag body simply and always with a general heat seal or the like.
In addition, it is easy to pour out the packaged items in the bag by tilting and standing up the packaging bag itself without any special operation on the nozzle, except for the tear removal of the nozzle tip, etc. Can be done.
And furthermore, by preventing the ingress of outside air into the packaging bag by crushing deformation of the packaging bag body accompanying the liquid dispensing and the excellent non-return function of the dispensing nozzle, The object to be packaged can be effectively protected from oxidation, fouling, flavor reduction and the like.

It is a top view which shows embodiment of the liquid extraction nozzle which concerns on this invention. It is a figure which shows the specific example of the extraction nozzle. It is an expanded sectional view which follows the III-III line of FIG. It is a figure which shows the tearing opening example of the extraction nozzle. It is a top view which illustrates the packaging bag which has a liquid pouring nozzle concerning this invention. It is a perspective view which shows the filling packaging state of the to-be packaged object to a packaging bag. It is a figure which shows the example of the extraction | pouring of the to-be-packaged item from the packaging bag accommodated in the box. It is a top view which shows other embodiment of a liquid extraction nozzle. It is an expanded sectional view which follows the IX-IX line of FIG. It is a rough-line perspective view which shows the measuring apparatus of waist.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of a liquid dispensing nozzle according to the present invention.
In the figure, 1 denotes a liquid pouring nozzle, and this pouring nozzle 1 is, for example, a fusing part of a soft packaging bag body 2 shown by an imaginary line in the sealant layer on the inner surface thereof. The base end is fused and joined by an outermost sealant layer, preferably a sealant layer made of the same resin material as the sealant layer of the packaging bag body.

  Here, the liquid pouring nozzle 1 is laminated on both sides of a thermoplastic base film layer, for example, a biaxially stretched PET layer or NY layer having a thickness of 5 to 40 μm, preferably 10 to 30 μm, and the base film layer. A laminated film arranged on each side of the front and back, i.e. contour, consisting of three layers with each sealant layer, e.g. unstretched PE layer or PP layer with a thickness of 5-80 [mu] m, preferably 10-60 [mu] m Two laminated films with the same shape on both the front and back sides, or a single laminated film folded back on the front and back at the center, preferably in each side portion excluding the base side in the mutually facing posture of the inner surface side sealant layer Can be constructed by fusing each other as shown by hatching in the figure by heat sealing.

  In the figure, reference numeral 3 denotes a tearing planned position of the pouring nozzle 1, which is a V-shaped bent portion that replaces the tearing start fist formed in one fusion part that opposes the nozzle width direction, usually the vertical direction in the figure. This V-shaped bent portion 3 functions to facilitate tearing and removal of the nozzle tip including the tip fused portion 4 of the dispensing nozzle 1. Here, the V-shaped bent portion 3 can also be formed at the fusion portion on the lower side of the figure.

Each of the two upper and lower fused parts 5, 6 is located opposite to the nozzle width direction and extends to the base end side of the dispensing nozzle 1, in the figure, from the position where the V-shaped bent part 3 is formed. On the base end side, it is preferable to extend from the V-shaped bent portion 3 so as to be inclined downwardly, and the interval between the fused portions 5 and 6 is V from the base end portion. It is preferable that this is gradually reduced gradually toward the V-shaped bent portion 3 until the formation position of the character-shaped bent portion 3 is reached.
Specifically, for example, as shown in FIG. 2, the inner width of the base end side of the nozzle 1 is 40 mm, and the length from the base end side to the position where the V-shaped fold 3 is formed is 31 mm. And the internal width in the formation position of the V-shaped bending part 3 can be 14 mm. In such a pouring nozzle, the base end portion having a width of about 10 mm on the base end side usually serves as a margin for fusion bonding to the packaging bag body 2.

  By the way, as shown in the enlarged sectional view along the line III-III of the nozzle width direction in FIG. 8, for example, each of the base film layers 9 disposed in the longitudinal direction (MD) substantially in the width direction of the laminated film, and the sealant layers 10 and 11 laminated on both surfaces of the base film layer 9. Where the layer structure is adopted, the sealant layers 10 on the inner surface sides facing each other are suitable over a predetermined width, for example, a width of 0.5 to 3 mm, preferably a width of 1.0 to 2.0 mm, in the peripheral portion excluding the base end side. In this case, it is possible to manufacture easily, quickly and always reliably by fusing it under a desired form by heat sealing, and the dispensing nozzle 1 has a flat shape at its base end. , The surface-side sealant layer 11 can be bonded to the inner surface of the packaging bag body 2, preferably also by heat sealing, so that the packaging bag body 2 can be always properly and reliably joined to the packaging bag body 2. it can.

  In such a pouring nozzle 1, the V-shaped bent portion 3 serving as an unsealing portion thereof is a plan view shown in FIG. 1, and is slightly deviated toward the tip side from the position where the nozzle level becomes the highest, and is directed downward. It is preferable to position it at a portion inclined to the position, and according to this, when the packaging bag is returned to the standing posture after the nozzle 1 is opened and the article to be packed is poured out, Can improve liquid breakage under the action of the inclined fusion part of the lower fusion part of the nozzle 1 and can advantageously prevent dripping of the package along the lower side of the nozzle 1.

  Looking at this liquid breakage, the tearing tip spout of the spout nozzle 1 is compared to that extending in the vertical direction as illustrated in FIG. 4 (a), as shown in FIG. 4 (b), It is preferable that the lower end is a receiving end-like tip spout that protrudes somewhat in an angle range of up to 15 ° to the front side, and this is, for example, the stretching direction of the uniaxially stretched base film layer or the “emblet” It can be easily realized by making the longitudinal direction (MD) such as “PC” coincide with the required extending direction of the tear tip opening.

The liquid pouring nozzle configured as described above is, for example, the same as the filling and packaging of the article to be packaged into the soft packaging bag body, or prior to the filling and packaging of the article to be packaged, as shown in FIG. The sealant layer 11 on the outer surface of the base end of the nozzle 1 is preferably bonded by heat sealing to the inner surface of the packaging bag body 2 at the fusion part between the sealant layers on the side of the packaging bag body 2. Thus, it is a part of the packaging bag 12 and protrudes laterally from the upper end portion of the packaging bag body 2 in the figure. Here, the packaging bag body itself and the fused part between the packaging bag body 2 and the dispensing nozzle are shown by hatching in the drawing.
In order to prevent mutual fusion of the sealant layer 10 on the inner surface of the nozzle in such fusion bonding of the outer surface of the base end portion of the nozzle 1 to the packaging bag main body 2, As described above, it is effective to make the melting points of the inner and outer sealant layers 10 and 11 different.

Here, it is preferable that the sealant layer forming the inner surface of the soft packaging bag body 2 is made of the same kind of resin material as the sealant layer on the outer surface of the nozzle in order to increase the fusion strength. Further, the base film layer of the packaging bag body can be made of the same kind as that of the nozzle 1 and can be selected from various materials having required physical properties.
In addition, when a required physical property cannot be ensured in a packaging bag only by a base film layer, it is also possible to interpose an intermediate | middle layer between a sealant layer and a base film layer.

  Such a wrapping bag 12 is in a bloated form as illustrated in FIG. 6 by filling and packaging the liquid article to be packed therein, preferably under deflation, but the soft wrapping bag itself. Usually, it is not self-supporting or formable, so when transporting, storing, displaying, or using the packaged items, it is fixed at several places in a box made of paper or plastic. Alternatively, it is preferable that the packaging bag be stored to give self-supporting property and formability.

On the other hand, in dispensing the required amount of the packaged material that has been filled and packaged, the nozzle 1 from the V-shaped bent portion 3 of the upper fused portion 5 of the dispensing nozzle 1 shown in the figure. The front end of the packaging bag 12 is removed by tearing, for example, with fingers, and the packaging bag 12 is opened. Then, the packaging bag 12 is preferably tilted together with a box body that holds and holds the packaging bag 12.
FIG. 7 is a diagram illustrating this tilting state. Under this tilting posture, the tip spout of the nozzle 1 protruding from the box 13 of the packaging bag 12 in the box 13 is wrapped in the bag. Due to the water head pressure of the object, it will be fully opened to the front and back sides, and will be poured out as required.
Note that such pouring is performed by increasing the tilt angle of the box 13 in accordance with the decrease in the packaged items in the bag.

  Here, the soft packaging bag 12 undergoes shrinkage deformation or crushing deformation in accordance with the volume of the dispensed amount when such an article to be packaged is dispensed, and thus into the packaging bag accompanying the dispensing. Thus, the outside air is sufficiently prevented from entering, and the in-bag package is effectively protected against the outside air.

After the required amount of articles to be packaged is thus dispensed, the box 13 is returned to the standing posture indicated by the phantom line in the figure to stop the dispensing, and at the same time, the automatic dispensing of the tip spout of the nozzle 1 is performed. Bring close contact close.
Here, as described above, this close closing of the pouring nozzle 1 is performed when the pouring nozzle 1 is released from the hydraulic head pressure, and the laminated films 7 and 8 on the front and back sides are produced at the time of producing the pouring nozzle 1. By returning to the original shape and placing the front and back films 7 and 8 in a reduced-pressure atmosphere when the article to be packaged in the pouring nozzle 1 flows down into the packaging bag body 2, the inner surfaces of those soft films Is carried out by, for example, being negatively adsorbed to each other over the entire width of the nozzle under the interposition of the article to be packaged. Such close contact is surely maintained when the packaging bag body 2 that has been crushed and deformed tends to have a reduced pressure in the packaging bag 12 based on its inherent elastic restoring force.
Therefore, here, based on the close closure of the nozzle 1 and the subsequent continuous maintenance of the close contact at the same time as the dispensing is stopped, the package contents in the bag are continuously protected from the outside air from the stop of the dispensing. You can also.

In this way, by simply splicing and joining the inexpensive dispensing nozzle 1 with a simple structure to the packaging bag body 2 by heat sealing or the like, it is possible to easily and reliably realize both of them. Further, it is possible to sufficiently prevent the outside air from entering the packaging bag in the operation of dispensing the article to be packaged in the packaging bag 12 without any special operation on the dispensing nozzle 1.
This ingress of outside air is sufficiently prevented even after the subsequent tilting of the packaging bag 12 for subsequent re-pouring of the article to be packaged and the subsequent stand-up return.

FIG. 8 is a plan view of a principal part showing another embodiment of the liquid pouring nozzle according to the present invention together with a soft packaging bag body.
As is apparent from FIG. 9 showing the cross section taken along the line IX-IX in FIG. 8, this liquid dispensing nozzle 22 constructed integrally with the packaging bag main body 21 at the same time as before or after the formation thereof. , The sealant layer 24 is laminated on the uniaxially or biaxially stretched base film layer 23 by extrusion lamination or dry lamination. For example, two laminated films 25 and 26 are packaged with the sealant layer 24 facing each other. The protrusions from the bag body 21, in the figure, the peripheral portions of the protrusions to the side of the upper end, preferably formed by fusion-bonding each other by heat sealing, and the width of the laminated films 25 and 26 Respective V-shaped bent portions 29 and 30 for tearing and opening are provided on the respective fused portions 27 and 28 with respect to the direction, corresponding to the upper and lower sides. .

  Here, as described above, the base film layer 23 may be a biaxially stretched PET layer or NY layer having a thickness of 8 to 30 μm, and the sealant layer 24 may have a thickness of 10 to 60 μm. It is preferable to use an unstretched PE layer or PP layer.

  And also in this pouring nozzle 22 here, the stretching direction of the uniaxially stretched base film layer or the longitudinal direction (MD direction) of the biaxially stretched base film layer is substantially the vertical direction shown in FIG. It is preferable to have a corresponding substantially width direction, and each of the fusion portions 27 and 28 facing each other in the width direction of the laminated films 25 and 26, and thus the nozzle flow path 31 partitioned by them, From the position where the V-shaped bent portions 29 and 30 are formed, the base end side is inclined to extend downward, and the interval between the fusion portions 27 and 28 is V-shaped from the base end portion. It is preferable to gradually decrease toward the V-shaped bent portions 29 and 30 until the bent portions 29 and 30 are formed.

Further, in any of the liquid pouring nozzle 22 and the liquid pouring nozzle 1 described above, the water vapor transmission rate as defined in JIS K7129 of the uniaxial or biaxially stretched base film layer is 40 ° C., 10g / (m ² · 24h) or less under the condition of 90% humidity, the wetting state of the pouring nozzles 1 and 22 that become wet and close to the package object, and the wet condition of the package object, This is preferable for maintaining the close contact state over a long period of time.
That is, when the water vapor transmission rate exceeds 10 g / (m ² · 24 h), the film thickness of the packaged material that contributes to the close-contact of the dispensing nozzles 1 and 22 contributes to the section of the nozzle channel 31. When each film unit area is 10 μm, the moisture in the intervening package disappears in 8 days and the check function of the pouring nozzle is impaired, so the pouring frequency is low. For a packaged item, the check period may be too short.

On the other hand, it is preferable that the bending strength per unit width (15 mm) of the laminated films 7, 8, 25, and 26 as the constituent materials of the respective dispensing nozzles 1 and 22 is in the range of 40 to 300 mN. .
Here, the bending strength is determined by sandwiching a laminated film F having a unit width (15 mm) with a clamper C, as illustrated in FIG. When the projecting length is 5 mm, the laminated film F is reciprocally displaced together with the clamper C, and the needle sensor N projecting from the upper end of the laminated film F is caused to interfere over the projecting length of 2 mm. It is obtained by measuring the magnitude of the input to the needle sensor N when the laminated film F is passed under the needle sensor N under bending deformation as shown in the enlarged sectional perspective view in the figure. The bending strength of the known biaxially stretched PET layer, that is, the stiffness measured according to this method was as shown in Table 1.

  In addition, a film obtained by vapor-depositing silica on each of biaxially stretched PET layers or NY layers, measured in the same manner, is used as a base film layer, and a commercially available low-density polyethylene or sealant layer as a sealant layer is used as the base film layer. Table 2 shows the stiffness of a laminated film formed by laminating polyethylene or polypropylene such as linear low density polyethylene by extrusion lamination or dry lamination, and particularly suitable for use in the production of the liquid pouring nozzle 22 shown in FIG. It became as shown in.

  In this case, the lower limit of the waist is set to 40 mN, as described above, to facilitate the accurate identification of the dispensing direction when the packaged material is poured from the packaging bag. This is to prevent insufficient strength of the packaging bag body that is integrated with the dispensing nozzle 22, and the upper limit value is set to 300 mN. This is to secure the stop.

  By the way, in such liquid pouring nozzles 1 and 22, the length of the nozzle pouring outlet edge after tearing and opening the liquid is set to be in the range of 5 to 40 mm. It is preferable in order to appropriately pour it out to the expected position while securing the amount.

  In addition, in the liquid dispensing nozzles 1 and 22 as described above, the thin film thickness of the packaged object interposed in the nozzles 1 and 22 at the time of sealing and closing the nozzle accompanying stoppage of the packaged package is In relation to the viscosity of the article to be packaged, the water content, the wettability of the nozzle itself, and the like, the range of 1 to 50 μm is preferable.

  In addition, in the place shown in FIG. 8, although it is supposed that the pouring nozzle 22 protrudes from the upper end of the side portion of the soft packaging bag body 21, the protruding position and the protruding form of the pouring nozzle 22 are determined as required. It can also be selected as appropriate, and can also be formed to project from the top of the packaging bag body 21.

  And in the packaging bag comprised in this way, when a liquid extraction nozzle is comprised integrally with a packaging bag main body, it will be outside of the formation part of the at least spout outlet formation part of the extraction nozzles 1 and 22, regardless of comprising separately. Silicone oil or other water repellent material is applied to the surface, in other words, the outer surface on the nozzle base side from the position of the tip spout formed by tearing the nozzle tip at the V-shaped bent portions 3, 29, 30, etc. In the case of application or the like, it is possible to further improve the liquid drainage property when stopping the pouring of the packaged item.

  Here, also by the packaging bag shown in FIG. 8 in which the liquid dispensing nozzle 22 is formed integrally with the packaging bag body 21, the filling and packaging of the packaged article as shown in FIG. In stopping this, the outside of the packaging bag body 21 is effectively introduced under the automatic check function of the liquid dispensing nozzle 22 by the same function as the dispensing nozzle 1 described above. Can be blocked.

  The liquid pouring nozzle according to the present invention is used to package soy sauce, sauces, various soups, beverages, etc., as well as dressings, detergents, liquid medicines and the like that may contain oil, liquor, wine, and granular materials. It can be applied to a soft packaging bag body to exhibit an excellent check function against the outside air.

1, 22 Liquid pouring nozzles 2, 21 Packaging bag main body 3, 29, 30 V-shaped bent portion 4 Tip fusion portion 5, 6, 27, 28 Fusion portion 7, 8, 25, 26 Laminated film 9, 23 Base film layer 10, 11, 24 Sealant layer 12 Packaging bag 13 box

Claims (4)

A liquid dispensing nozzle used by fusing and joining the base end to the side or top of the flexible packaging bag body,
Peripheral portions excluding the base end of each laminated film on the front and back, each comprising a uniaxial or biaxially stretched base film layer and respective sealant layers laminated therebetween, with one sealant layer facing each other And fused with each other,
When the packaged bag body is poured, the tip of the package bag body is tilted and the inner surface is separated from each other by the water head pressure of the packaged bag to open the tip spout. While taking out outside air into the packaging bag by shrinking or crushing according to the volume of the package dispensed,
When the packaging bag is raised and returned at the same time as the pouring of the packaged item is stopped, it is released from the action of the head pressure of the packaged product and returns to its original shape, and a thin film of the packaged product is interposed. The inner surfaces wetted with each other are exposed to a reduced-pressure atmosphere based on the shrinkage or crushing deformation of the packaging bag main body, adsorb negative pressure to each other, and automatically seal the spout into the packaging bag. A liquid pouring nozzle comprising a self-seal check function for preventing the outside air from entering. A liquid dispensing nozzle that is integrally formed by protruding from the side or top of the flexible packaging bag body,
Each laminated film on the front and back, comprising a uniaxially or biaxially stretched base film layer and a sealant layer laminated on one surface side of the base film layer, has a protruding portion from the packaging bag body in a mutually opposing posture of the sealant layer. It is fused to each other at the peripheral part,
When the packaged bag body is poured, the tip of the package bag body is tilted and the inner surface is separated from each other by the water head pressure of the packaged bag to open the tip spout. While taking out outside air into the packaging bag by shrinking or crushing according to the volume of the package dispensed,
When the packaging bag is raised and returned at the same time as the pouring of the packaged item is stopped, it is released from the action of the head pressure of the packaged product and returns to its original shape, and a thin film of the packaged product is interposed. The inner surfaces wetted with each other are exposed to a reduced-pressure atmosphere based on the shrinkage or crushing deformation of the packaging bag main body, adsorb negative pressure to each other, and automatically seal the spout into the packaging bag. A liquid pouring nozzle comprising a self-seal check function for preventing the outside air from entering. The liquid pouring nozzle according to claim 1 or 2, wherein the water vapor permeability (JIS K7129) of the uniaxial or biaxially stretched base film layer is 10 g / (m ² · 24 h) or less. The liquid pouring nozzle according to any one of claims 1 to 3, wherein a bending strength per unit width (15 mm) of the laminated film is 40 to 300 mN.

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